Landfill method for rapid stabilization of chromium-containing soil and household garbage

A domestic waste and stabilization technology, applied in the field of environmental engineering, can solve the problems of high power consumption, unsuitable for large-scale disposal of chromium-containing soil, and difficulty in meeting farmland use standards, and achieves the effect of accelerating stabilization.

Active Publication Date: 2014-08-13
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can restore chromium-containing soil, it consumes a lot of electricity and takes a long time to treat, so it is not suitable for large-scale disposal of chromium-containing soil.
[0004] In addition, although the concentration of hexavalent chromium in the chromium-containing soil treated by most current methods is reduced, the total chromium concentration is extremely high, so it is difficult to meet the standards for farmland use, and generally needs to be landfilled

Method used

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  • Landfill method for rapid stabilization of chromium-containing soil and household garbage
  • Landfill method for rapid stabilization of chromium-containing soil and household garbage

Examples

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example 1

[0021] The anti-seepage layer is laid on the bottom of the landfill, and the perforated collection pipe is laid on it, with a diameter of 1cm, and the interval of each small hole is 20cm, and the diameter of the collection pipe is 50cm, which is connected to the leachate collection pool at the bottom. Gravel is laid over the perforated collection pipe.

[0022] The mixed garbage layer is laid on the gravel, which is composed of 3 landfill garbage unit layers, with a total height of no more than 40m. Each landfill waste unit layer is composed of chromium-containing soil, mineralized waste, anaerobic sludge and domestic waste after a certain combination. The composition of each landfill unit layer is as follows: the bottom is laid with a mineralized garbage layer with a height of 1m, which is used to stabilize the leachate containing hexavalent chromium and organic matter; the upper part is laid with a mixed layer of anaerobic sludge and kitchen waste, of which The mud and kitc...

example 2

[0026] The anti-seepage layer is laid on the bottom of the landfill, and the perforated collection pipe is laid on it, with a diameter of 3cm, and the interval of each small hole is 50cm, and the diameter of the collection pipe is 50cm, which is connected with the leachate collection pool at the bottom. Gravel is laid over the perforated collection pipe.

[0027] The mixed garbage layer is laid on the gravel, which is composed of 3 landfill garbage unit layers, with a total height of no more than 40m. Each landfill waste unit layer is composed of chromium-containing soil, mineralized waste, anaerobic sludge and domestic waste after a certain combination. The composition of each landfill unit layer is as follows: a layer of mineralized garbage with a height of 2m is laid on the bottom to stabilize the leachate containing hexavalent chromium and organic matter; a mixed layer of anaerobic sludge and kitchen waste is laid on the upper Oxygen sludge and kitchen waste are mixed at ...

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Abstract

The invention relates to a landfill method for rapid stabilization of chromium-containing soil and household garbage. The chromium-containing soil, mineralized waste, anaerobic sludge and kitchen garbage are mixed and filled in the land by a certain way, and then the leachate is subjected to continuous reflux; and 1-2 years after filling, the leachate wastewater can reach discharge standards, so as to achieve stabilization of chromium slag and household garbage.

Description

technical field [0001] The invention relates to a landfill method capable of quickly stabilizing chromium-containing soil and domestic garbage, which involves mixing sludge, chromium-containing soil and domestic garbage for landfill, controlling certain conditions, and realizing the stabilization of the two, which belongs to environmental engineering technology field. Background technique [0002] Chromium and its compounds are commonly used basic raw materials in metallurgy, metal processing, electroplating, tanning, paint, pigment and other industries. In the production process of the above industries, a large amount of chromium-containing waste gas, waste water and waste residue will be generated, resulting in serious environmental pollution problems. [0003] On the other hand, how to remediate chromium-containing soil has always been a difficult problem in the environmental protection circle. Although there are many disposal methods, most of them have various probl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/08B09B3/00E03F3/02E03F3/04E03F5/00
Inventor 张大磊孙英杰孙喆刘琮
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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